CVE WatchJul 23, 2026

CVE-2026-63732

9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default password (123456) that authenticates any fresh ins

CVSS

9.9

Critical

EPSS

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KEV

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Exploit Today

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0-100

Published: Jul 23, 2026 · Last modified: Jul 23, 2026 · CWE-78

EPSS · 30d

Not enough EPSS history yet.

Technical description

9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default password (123456) that authenticates any fresh installation, a bypass of the LOCAL_ONLY network gate via a spoofed Host header, and unvalidated arguments passed to child_process.spawn() when registering MCP plugins. A remote, unauthenticated attacker can log in with the default credential, spoof the Host header to reach local-only routes, and register a malicious MCP plugin (e.g. node -e <payload>) to achieve arbitrary code execution on the host operating system when the plugin's SSE endpoint is triggered.

Official references

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